Boiler-flue.



PATENTED AUG. 28, 1906.

J. M. UROZIER. BOILER FLUE. i Muon-Ion uns un. 1a, woe.

I irl" co., luumlloan D L.

flue-sheets of the boiler, to which the UNITED STATES PATENT OFFICE.

BoiLEFi-FLUE.

Specification of Letters Patent. j

Patented Aug. 2B, 1 906.

Application filed January 18,1906. Serial No. 296,633.

To all whom it may concern:

Be it known that I, JOHN M. Onozina, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements inDetachable Boiler-Fluss; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention has for its object to provide certain improvements indetachable boilerfines; and it consists of the novel devices andcombinations of devices hereinafterdescribed, and defined in the claim.

In the accompanying drawings, which illustrate my invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings, Figure i is a vertical section takenlongitudinally and centrally through the detachable boiler-fine andthrough the flue-sheets, to which it is. shown as applied, some partsbeing broken away. Fig. 2 is a plan view of the right-side end of theflue shown in Fig. 1, the fine-sheet only being sectioned; and Fig. 3 isan end elevation looking at the right-hand end of the detachable iiue.

The numeral 1 indicates laterally-s iaced ue 1s shown as applied. Thenumeral 2 indicates the fine. At one end the flue is slightly enlargedat its exterior surface, so as to form an inwardly-taperedslightly-conical sleeve portion 3, that is rigidly and integrally formedtherewith. The other end of said flue is threaded externally at 4, andon this threaded portion works a slightly-conical inwardlytapered sleeve5, which is preferably formed with notches 6 at its enlarged end, sothat it may be turned by a suitable wrench or tool.

The seats 7 in the flue-sheets i are tapered to correspond to the taperof the respective cooperating sleeve portions 3 and 5. Annular bushingor acking rings 9, of copper or other comparatively soft metal of highfusibility, are interposed, in the one instance, between the taperedsleeve 3 and ('.oiiperating tapered seat 7 and, in the other instance,between the tapered sleeve 5 and the cooperating tapered seat 7. Thesepliable or ductile packing-rings 8 are placed within their seats 5 inadvance of the application of the flue and by a swaging, rolling, orother action are permanently secured within their seats by having theprojecting portions of the said packing-rings pressed outward orslightly beyond the respective seats 7 on the opposite sides of theliuc-sheet.

The manner of applying the fine is probably obvious, but may be brieflystated as follows: IVhile the removable sleeve 5 isremoved from thefiue, the flue is inserted through one of the seats 5 and its sleeveortion 3 is driven or otherwise forced in c ose and tight engagementwith the cooperating relatively fixed bushing 8. Then the sleeve 5 isscrewed onto the other end of the flue and is tightly forced into theother bushing 8. The taper of the sleevc portions 3 and 5 is so slightthat very little lateral pressure will be put upon the Vflue-sheet,while very great pressure will be put upon the cooperating bushings 8.The bushings swaged or upset, so that they permanently hang to theirseats in the flue-sheet, forni extremely close and tight jointstherewith and cannot possibly get out of piace in applying the fiue orin removing the iiue. This feature is therefore very important.

The iiue described is of small cost, and in actual practice it has beenfound efficient for the purposes had in view.

The seats 7 in the laterally-spaced fineshects l are of the sainediameter. The sleeve portions at the opposite ends of the 'flue are ofthe same diameter, and the softmetai bushings 8 are of the same diameterand thickness. This construction makes it possible to insert the fiueeither into the oiler-to wit, in Fig. 1 either from the left toward theright or from the right toward the left. It is of course desirable toalways have the projecting sleeves 5 within the smokebox asdistinguished from the fire-box and the boiler, because of the fact thatthe rigid or integrally-formcd sleeve portions 3 are better adapted tostand intense heat than are the said sleeves 5.

What l claiiii, and desire to secure by Letters Patent of the United`States, is as follows:

InV a boiler, the combination with laterallyspaced flue-sheets havingtapered flue-seats of the saine diameter and taper, of a Hue having atone end a `fixed conical sleeve ortion, and at its other end ascrew-thrcadec conical portion, said two conical sleeve portions havingthe same diameter and the saine taper as said flue-seats, and annularpacking-rings of lOO relatively soft material but ol high fusibility Intestimony whereof I affix my signature interposed lbetween siid conicalsleevz Iaorin presence of two Witnesses.

tions and tie surroun ing seats in sai l ue A Sheets, and whichpacking-rings are swfiged l JOHN M CRO/IER or upset at their .inner andouter portions so Witnesses:

that they are permanently secured in the MALIE HOEL,

said flue-seats, substantially as described. F. D. MERCHANT.

